EXHIBIT 10.8 THIRD AMENDMENT TO CANADIAN CREDIT AGREEMENT THIS THIRD AMENDMENT TO CANADIAN CREDIT AGREEMENT (herein called this "Amendment") made as of July 31, 2001 by and among Northstar Energy Corporation, an Alberta corporation ("Canadian Borrower"), Bank of America Canada, individually and as administrative agent ("Canadian Agent"), and the Canadian Lenders party to the Original Agreement defined below ("Canadian Lenders"). WITNESSETH: WHEREAS, Canadian Borrowers, Canadian Agent and Canadian Lenders entered into that certain Canadian Credit Agreement dated as of August 29, 2000 (as amended, supplemented, or restated to the date hereof, the "Original Agreement"), for the purpose and consideration therein expressed, whereby Canadian Lenders became obligated to make loans to Canadian Borrowers as therein provided; WHEREAS, on January 1, 2001 Northstar Energy, Devon Energy Canada Holding Corporation (the successor by amalgamation to Devon Energy Canada) and certain other Alberta corporations, all of which were Subsidiaries of US Borrower, amalgamated under the name Northstar Energy Corporation (defined above as the "Canadian Borrower") which is now the sole Canadian Borrower; WHEREAS, Canadian Borrower, Canadian Agent and Canadian Lenders desire to amend the Original Agreement as set forth herein; NOW, THEREFORE, in consideration of the premises and the mutual covenants and agreements contained herein and in the Original Agreement, in consideration of the loans which may hereafter be made by Canadian Lenders to Canadian Borrower, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto do hereby agree as follows: ARTICLE I. Definitions and References Section 1.1. Terms Defined in the Original Agreement. Unless the context otherwise requires or unless otherwise expressly defined herein, the terms defined in the Original Agreement shall have the same meanings whenever used in this Amendment. Section 1.2. Other Defined Terms. Unless the context otherwise requires, the following terms when used in this Amendment shall have the meanings assigned to them in this Section 1.2. Third Amendment to Canadian Credit Agreement "Amendment" means this Third Amendment to Canadian Credit Agreement. "Canadian Agreement" means the Original Agreement as amended hereby. ARTICLE II. Amendments to Original Agreement Section 2.1. Defined Terms. (a) The definition of "ERISA Plan" in Annex I of the Original Agreement is hereby amended in its entirety to read as follows: "'ERISA Plan' means any employee pension benefit plan (other than a Multiemployer Plan) subject to Title IV of ERISA maintained by any ERISA Affiliate with respect to which any Restricted Person has a fixed or contingent liability." (b) The definition of "Permitted Liens" in Annex I of the Original Agreement is hereby amended by deleting subsection (w) thereof and adding the following new subsections (w) and (x) in lieu thereof: "(w) Liens on Margin Stock. (x) in addition to Liens permitted by clauses (a) through (w) above, Liens on property or assets if the aggregate Indebtedness secured thereby does not exceed US $50,000,000." (c) The definition of "Stamping Fee Rate" in Annex I of the Original Agreement is hereby amended in its entirety to read as follows: "`Stamping Fee Rate' means with respect to any Bankers' Acceptance accepted by any Canadian Resident Lender at any time, the Applicable Margin then in effect. (d) The definition of "Termination Event" in Annex I of the Original Agreement is hereby amended in its entirety to read as follows: "'Termination Event' means (a) the occurrence with respect to any ERISA Plan of (i) a reportable event described in Sections 4043(c)(5) or (6) of ERISA or (ii) any other reportable event described in Section 4043(c) of ERISA other than a reportable event not subject to the provision for 30-day notice to the Pension Benefit Guaranty Corporation pursuant to a waiver by such corporation under Section 4043(a) of ERISA; or (b) the withdrawal of any ERISA Affiliate from an ERISA Plan during a plan year in which it was 2 Third Amendment to Canadian Credit Agreement a "substantial employer" as defined in Section 4001(a)(2) of ERISA; or (c) a complete or partial withdrawal by any ERISA Affiliate from a Multiemployer Plan or notification that a Multiemployer Plan is in reorganization; or (d) the filing of a notice of intent to terminate any ERISA Plan or Multiemployer Plan or the treatment of any ERISA Plan amendment or Multiemployer Plan amendment as a termination under Section 4041 or 4041A of ERISA; or (e) the institution of proceedings to terminate any ERISA Plan or Multiemployer Plan by the Pension Benefit Guaranty Corporation under Section 4042 of ERISA; or (f) any other event or condition which might constitute grounds under Section 4042 of ERISA for the termination of, or the appointment of a trustee to administer, any ERISA Plan or Multiemployer Plan." (e) The definition of "Total Capitalization" in Annex I of the Original Agreement is hereby amended in its entirety to read as follows: "'Total Capitalization' means the sum (without duplication) of (i) US Borrower's Consolidated Total Funded Debt plus (ii) US Borrower's Consolidated shareholder's equity plus (iii) 60% of the outstanding balance of the Devon Trust Securities. Total Capitalization shall be calculated excluding non-cash write-downs and related charges which are required under Rule 4-10 (Financial Accounting and Reporting for Oil and Gas Producing Activities Pursuant to the Federal Securities Laws and the Energy Policy and Conservation Act of 1975) of Regulation S-X promulgated by Securities and Exchange Commission Regulation, or by US GAAP." (f) The first sentence of the definition of "Unrestricted Subsidiary" in Annex I of the Original Agreement is hereby amended in its entirety to read as follows (it being understood that the last sentence thereof and the list of Unrestricted Subsidiaries set forth therein are not being modified by this Amendment): "'Unrestricted Subsidiary' means any corporation, association, partnership, limited liability company, joint venture, or other business or corporate entity, enterprise or organization (i) which is listed below in this definition, or (ii) in which US Borrower did not own an interest (directly or indirectly) as of August 29, 2000, which thereafter became a Subsidiary of US Borrower and which, within 90 days after becoming a Subsidiary of US Borrower, is designated as an Unrestricted Subsidiary by US Borrower to US Agent; provided that in the event any such Subsidiary becomes a Material Subsidiary at any time, such Subsidiary shall cease to be an Unrestricted Subsidiary at such time and shall automatically become a Restricted Subsidiary." (g) The following defined terms are hereby added to Annex I of the Original Agreement in alphabetical order: "'Disclosure Report' means a written notice given by US Borrower to all Lender Parties or a certificate given by the Senior Vice President-Finance or the Treasurer of US Borrower under Sections 6.2(a) and (b)." 3 Third Amendment to Canadian Credit Agreement "'Multiemployer Plan' means a multiemployer plan within the meaning of Section 4001(a)(3) of ERISA to which any ERISA Affiliate is making or is obligated to make contributions or, during the five preceding plan years, has made or has been obligated to make contributions." "'Margin Stock' means 'margin stock' as defined in Reg U." "'Material Subsidiary' means a Subsidiary of US Borrower which owns assets having a book value that exceeds ten percent (10%) of the book value of US Borrower's Consolidated assets." "'Reg U' means Regulation U promulgated by the Board of Governors of the Federal Reserve System." Section 2.2. Default Rate. Section 1.5(a)(vi) of the Original Agreement is hereby amended in its entirety to read as follows: "(vi) All past due principal of and past due interest on the Canadian Loans shall bear interest on each day outstanding at the applicable Default Rate in effect on such day, and such interest shall be due and payable daily as it accrues." Section 2.3. Use of Proceeds. Section 1.10 of the Original Agreement is hereby amended in its entirety to read as follows: "Section 1.10. Use of Proceeds. Canadian Borrower shall use all Canadian Advances and Canadian Swing Loans made under this Agreement to refinance existing indebtedness (including any commercial paper issued by or for the account of Canadian Borrower), to finance capital expenditures, to refinance Matured Canadian LC Obligations outstanding under this Agreement, and to provide working capital for its operations and for other general business purposes. Canadian Borrower shall use all Letters of Credit for its general corporate purposes. If any Canadian Advance or Canadian Swing Loan is used for a purpose which is governed by Reg U, Canadian Borrower shall comply with Reg U in all respects. Canadian Borrower represents and warrants that Canadian Borrower is not engaged principally, or as one of Canadian Borrower's important activities, in the business of extending credit to others for the purpose of purchasing or carrying Margin Stock." Section 2.4. Conditions Precedent. Section 4.3(c) of the Original Agreement is hereby deleted. Section 2.5. Representations and Warranties; Litigation. Sections 5.2 and 5.7 of the Original Agreement are hereby amended in their entirety to read as follows: "Section 5.2 Organization and Good Standing. Each of Canadian Borrower and the 4 Third Amendment to Canadian Credit Agreement Material Subsidiaries of Canadian Borrower is duly organized, validly existing and in good standing under the Laws of its jurisdiction of organization, having all powers required to carry on its business and enter into and carry out the transactions contemplated hereby. Each of Canadian Borrower and the Material Subsidiaries of Canadian Borrower is duly qualified, in good standing, and authorized to do business in all other jurisdictions within Canada wherein the character of the properties owned or held by it or the nature of the business transacted by it makes such qualification necessary except where failure to so qualify would not have a Material Adverse Effect. Each of Canadian Borrower and the Material Subsidiaries of Canadian Borrower has taken all actions and procedures customarily taken in order to enter, for the purpose of conducting business or owning property, each jurisdiction outside Canada wherein the character of the properties owned or held by it or the nature of the business transacted by it makes such actions and procedures desirable except where failure to so qualify would not have a Material Adverse Effect. Section 5.7. Litigation. Except as disclosed in the Initial Financial Statements, in the financial statements delivered to each Lender Party pursuant to Section 6.2, in the Disclosure Schedule or in a Disclosure Report, there are no actions, suits or legal, equitable, arbitrative or administrative proceedings pending, or to the knowledge of Canadian Borrower threatened, against Canadian Borrower or any Subsidiary of Canadian Borrower that is a Restricted Person before any Tribunal which would reasonably be expected to have a Material Adverse Effect, and there are no outstanding judgments, injunctions, writs, rulings or orders by any such Tribunal against any such Person which would reasonably be expected to have a Material Adverse Effect." Section 2.6. Representations and Warranties; Names and Places of Business. Section 5.9 of the Original Agreement is hereby deleted in its entirety. Section 2.7. Representations and Warranties; Canadian Borrower's Subsidiaries; Title to Properties; Licenses. Sections 5.10 and 5.11 of the Original Agreement are hereby amended in their entirety to read as follows: "Section 5.10. Canadian Borrower's Subsidiaries. Canadian Borrower does not presently have any Material Subsidiary except those listed in the Disclosure Schedule or in a Disclosure Report (it being understood that inclusion of a Subsidiary on the Disclosure Schedule does not mean that such Subsidiary is a Material Subsidiary). Canadian Borrower owns, directly or indirectly, the equity interest in each of its Material Subsidiaries which is indicated in the Disclosure Schedule or in a Disclosure Report. Section 5.11. Title to Properties; Licenses. Canadian Borrower and each Subsidiary of Canadian Borrower that is a Restricted Person has good and defensible title to all of its material properties and assets, free and clear of all Liens other than Permitted Liens and of all impediments to the use of such properties and assets in such Restricted Person's business except to the extent failure to have such title would not have a Material Adverse Effect. Canadian Borrower and each Subsidiary of Canadian Borrower that is a 5 Third Amendment to Canadian Credit Agreement Restricted Person possesses all licenses, permits, franchises, patents, copyrights, trademarks and trade names, and other intellectual property (or otherwise possesses the right to use such intellectual property) which are necessary to carry out its business as presently conducted and as presently proposed to be conducted hereafter except to the extent failure to possess such licenses, permits, franchises, and intellectual property would not have a Material Adverse Effect, and no such Restricted Person is in violation in any material respect of the terms under which it possesses such intellectual property or the right to use such intellectual property except to the extent any such violation would not have a Material Adverse Effect." Section 2.8. Notice of Material Events and Change of Address. Section 6.4 of the Original Agreement is hereby amended to replace all references therein to the amount of "$100,000,000" to "$125,000,000", to delete the last sentence of such section, and to amend clause (d) thereof in its entirety to read as follows: "(d) the occurrence of any Termination Event which could reasonably be expected to cause (i) the total amount of withdrawal liability that would be incurred by all ERISA Affiliates upon their complete withdrawal from all Multiemployer Plans to exceed US $125,000,000, or (ii) the aggregate Liabilities of the ERISA Affiliates to ERISA Plans to exceed $125,000,000." Section 2.9. Environmental Matters. Section 6.12(b) of the Original Agreement is hereby amended to replace the reference therein to the amount of "$100,000,000" to "$125,000,000." Section 2.10. Indebtedness. Subsections (b) and (l) of Section 7.1 of the Original Agreement are hereby amended in their entirety to read as follows: "(b) capital lease obligations (excluding oil, gas or mineral leases) entered into in the ordinary course of such Restricted Person's business in arm's length transactions at competitive market rates under competitive terms and conditions in all respects, provided that such capital lease obligations required to be paid in any Fiscal Year do not in the aggregate exceed US $50,000,000 for all Restricted Subsidiaries, whether or not Subsidiaries of Canadian Borrower. (l) miscellaneous items of Indebtedness of all Restricted Persons (other than US Borrower) not described in subsections (a) through (k) which do not in the aggregate exceed US $400,000,000 in principal amount at any one time outstanding." Section 2.11. Limitation on Restricted Payments. Section 7.5 of the Original Agreement is hereby deleted. Section 2.12. Events of Default. Subsection (c) and (e) of Section 8.1 of the Original Agreement are hereby amended in their entirety to read as follows: 6 Third Amendment to Canadian Credit Agreement "(c) Any Restricted Person fails (other than as referred to in subsections (a) or (b) above) to (i) duly comply with Section 1.10 or Section 7.4(b) of the Canadian Agreement or (ii) duly observe, perform or comply with any other covenant, agreement, condition or provision of any Canadian Loan Document, and such failure remains unremedied for a period of thirty (30) days after notice of such failure is given by Canadian Agent to Canadian Borrower; (e) Any Restricted Person fails to duly pay any Indebtedness in excess of US $125,000,000 constituting principal or interest owed by it with respect to borrowed money or money otherwise owed under any note, bond, or similar instrument, or (ii) breaches or defaults in the performance of any agreement or instrument by which any such Indebtedness is issued, evidenced, governed, or secured, other than a breach or default described in clause (i) above, and any such failure, breach or default results in the acceleration of such Indebtedness; provided that notwithstanding any provision of this subsection (e) to the contrary, to the extent that the terms of any such agreement or instrument governing the sale, pledge or disposal of Margin Stock or utilization of the proceeds of such Indebtedness in connection therewith would result in such acceleration and in a Default or an Event of Default under this Agreement, and would cause this Agreement or any Canadian Loan to be subject to the margin requirements or any other restriction under Reg U, then such acceleration shall not constitute a Default or Event of Default under this subsection (e);" Section 2.13. Additional Events of Default. Section 8.1(h) is hereby amended by replacing all references therein to the amount of "$100,000,000" to "$125,000,000." Section 2.14. Amendments to Statutes and Regulations. Section 10.18 of the Original Agreement is hereby amended by adding the following sentence at the end thereof: "Unless the context otherwise requires or unless otherwise provided herein, the references in this Agreement to a particular statute, rule or regulation also refer to and include all amendments, supplements and other modifications to such statute, rule or regulation." Section 2.15. Disclosure Schedule. Paragraph 6 of the Disclosure Schedule to the Original Agreement is hereby amended by adding the name of the following Subsidiary thereto: Canadian Mustang Energy Inc. Section 2.16. Canadian Notes. Each Canadian Note (and the form of Canadian Note attached as Exhibit A-1 to the Original Agreement) are hereby amended by deleting the proviso at the end of the first sentence of the fourth paragraph thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, Canadian Base Rate Loans shall bear interest on each day outstanding at the applicable Default Rate in effect on such day". Each Canadian Note (and the form of Canadian Note attached as Exhibit A-1 to the Original Agreement) are hereby further amended by deleting the proviso at the end of the third sentence of the fourth paragraph 7 Third Amendment to Canadian Credit Agreement thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, Canadian Prime Rate Loans shall bear interest on each day outstanding at the applicable Default Rate in effect on such day." Each Canadian Note (and the form of Canadian Note attached as Exhibit A-1 to the Original Agreement) are hereby further amended by deleting the proviso at the end of the fifth sentence of the fourth paragraph thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, such US Dollar Eurodollar Loan shall bear interest on each day outstanding at the applicable Default Rate in effect on such day." Each Canadian Note (and the form of Canadian Note attached as Exhibit A-1 to the Original Agreement) are hereby further amended by deleting the proviso at the end of the seventh sentence of the fourth paragraph thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, such Canadian Dollar Eurodollar Loan shall bear interest on each day outstanding at the applicable Default Rate in effect on such day." Section 2.17. Canadian Swing Note. The Canadian Swing Note (and the form of Canadian Swing Note attached as Exhibit A-2 to the Original Agreement) are hereby amended by deleting the proviso at the end of the first sentence of the fourth paragraph thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, Canadian Swing Loans shall bear interest on each day outstanding at the applicable Default Rate in effect on such day." Section 2.18. Competitive Bid Notes. Each Competitive Bid Note issued under the Canadian Agreement (and the form of Competitive Bid Note attached as Exhibit M to the Original Agreement) are hereby amended by deleting the proviso at the end of the first sentence of the fifth paragraph thereof which reads as follows: "; provided that if an Event of Default has occurred and is continuing, such Competitive Bid Loan shall bear interest on each day outstanding at the applicable Default Rate in effect on such day." ARTICLE III. Conditions of Effectiveness Section 3.1. Effective Date. This Amendment shall become effective as of the date first above written when and only when: (a) Canadian Agent shall have received all of the following, at Canadian Agent's office, duly executed and delivered and in form and substance satisfactory to Canadian Agent, all of the following: (i) this Amendment executed by Canadian Borrower, Canadian Agent and Canadian Required Lenders; provided that the amendment set forth in Section 2.2 hereof, insofar as it applies to the Canadian Notes, and in Section 2.16 hereof shall become effective only when executed and delivered by all Canadian Lenders, the amendment set forth in Section 2.3 hereof, insofar as it applies to the Canadian Swing Note, and in Section 2.17 hereof shall become effective only when executed and delivered by the Canadian Swing Lender, and the amendment set forth in Section 2.3 hereof, insofar as it 8 Third Amendment to Canadian Credit Agreement applies to any Competitive Bid Note, and in Section 2.18 hereof shall become effective only when executed and delivered by the holder of such Competitive Bid Note; and provided further that the amendment set forth in Section 2.4 of this Amendment shall become effective only when executed and delivered by all Canadian Lenders. (ii) a certificate of the Chairman of the Board, President, or Vice President - Finance of Canadian Borrower dated the date of this Amendment certifying: (i) that all of the representations and warranties set forth in Article IV hereof are true and correct at and as of such date, and (ii) that no Default exists at and as of such date. (b) Canadian Borrower shall have paid, in connection with such Canadian Loan Documents, all fees and reimbursements to be paid to Canadian Agent pursuant to any Canadian Loan Documents, or otherwise due Canadian Agent and including fees and disbursements of Canadian Agent's attorneys. ARTICLE IV. Representations and Warranties Section 4.1. Representations and Warranties of Canadian Borrower. In order to induce each Canadian Lender to enter into this Amendment, Canadian Borrower represents and warrants to each Canadian Lender that: (a) The representations and warranties contained in Article V of the Original Agreement are true and correct at and as of the time of the effectiveness hereof, except to the extent that the facts on which such representations and warranties are based have been changed by the extension of credit under the Canadian Agreement. (b) Canadian Borrower is duly authorized to execute and deliver this Amendment and is and will continue to be duly authorized to borrow monies and to perform its obligations under the Canadian Agreement. Canadian Borrower has duly taken all corporate action necessary to authorize the execution and delivery of this Amendment and to authorize the performance of the obligations of Canadian Borrower hereunder. (c) The execution and delivery by Canadian Borrower of this Amendment, the performance by Canadian Borrower of its obligations hereunder and the consummation of the transactions contemplated hereby do not and will not (i) conflict with any provision of (A) any Law, (B) the organizational documents of Canadian Borrower, or (C) any agreement, judgment, license, order or permit applicable to or binding upon Canadian Borrower unless such conflict would not reasonably be expected to have a Material Adverse Effect, or (ii) result in or require the creation of any Lien upon any assets or properties of Canadian Borrower which would reasonably be expected to have a Material Adverse Effect, except as expressly contemplated or permitted in the Loan Documents. Except as expressly contemplated in the Loan Documents no consent, approval, authorization or order of, and no notice to or filing with, any Tribunal or third party is required in connection with the execution, delivery or performance by Canadian Borrower 9 of this Amendment or to consummate any transactions contemplated by this Amendment, unless failure to obtain such consent would not reasonably be expected to have a Material Adverse Effect. (d) When duly executed and delivered, each of this Amendment and the Canadian Agreement will be a legal and binding obligation of Canadian Borrower, enforceable in accordance with its terms, except as limited by bankruptcy, insolvency or similar laws of general application relating to the enforcement of creditors' rights and by equitable principles of general application. (e) The audited annual Consolidated financial statements of US Borrower dated as of December 31, 2000 and the unaudited quarterly Consolidated financial statements of US Borrower dated as of March 31, 2001 fairly present the Consolidated financial position at such dates and the Consolidated statement of operations and the changes in Consolidated financial position for the periods ending on such dates for US Borrower. Copies of such financial statements have heretofore been delivered to each Canadian Lender. Since such dates no material adverse change has occurred in the Consolidated financial condition or businesses of US Borrower. ARTICLE V. Miscellaneous Section 5.1. Ratification of Agreements. The Original Agreement and the Canadian Notes as hereby amended are hereby ratified and confirmed in all respects. The Canadian Loan Documents, as they may be amended or affected by this Amendment, are hereby ratified and confirmed in all respects. Any reference to the Canadian Agreement in any Loan Document shall be deemed to be a reference to the Original Agreement as hereby amended. The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as a waiver of any right, power or remedy of Canadian Lenders under the Canadian Agreement or any other Canadian Loan Document nor constitute a waiver of any provision of the Canadian Agreement or any other Canadian Loan Document. Section 5.2. Survival of Agreements. All representations, warranties, covenants and agreements of Canadian Borrower herein shall survive the execution and delivery of this Amendment and the performance hereof, including without limitation the making or granting of the Loans, and shall further survive until all of the Obligations are paid in full. All statements and agreements contained in any certificate or instrument delivered by Canadian Borrower or any Restricted Person hereunder or under the Canadian Agreement to any Canadian Lender shall be deemed to constitute representations and warranties by, and/or agreements and covenants of, Canadian Borrower under this Amendment and under the Canadian Agreement. 10 Third Amendment to Canadian Credit Agreement Section 5.3. Canadian Loan Documents. This Amendment is a Canadian Loan Document, and all provisions in the Canadian Agreement pertaining to Canadian Loan Documents apply hereto. Section 5.4. Governing Law. This Amendment shall be governed by and construed in accordance the laws of the Province of Alberta and any applicable laws of Canada in all respects, including construction, validity and performance. Section 5.5. Counterparts; Fax. This Amendment may be separately executed in counterparts and by the different parties hereto in separate counterparts, each of which when so executed shall be deemed to constitute one and the same Amendment. This Amendment may be validly executed by facsimile or other electronic transmission. THIS AMENDMENT AND THE OTHER CANADIAN LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS OF THE PARTIES. IN WITNESS WHEREOF, this Amendment is executed as of the date first above written. NORTHSTAR ENERGY CORPORATION Canadian Borrower By: /s/ John Richels -------------------------------------------- Name: John Richels Title: President & Chief Executive Officer 11 Third Amendment to Canadian Credit Agreement BANK OF AMERICA CANADA Administrative Agent, Canadian LC Issuer and Lender By: /s/ Donald R. Chung --------------------------------------- Name: Donald R. Chung Title: Vice President Corporate Investment Banking BANK ONE, NA CANADA BRANCH Lender By: /s/ Ronald L. Dierker --------------------------------------- Name: Ronald L. Dierker Title: Director, Capital Markets THE CHASE MANHATTAN BANK, TORONTO BRANCH Lender By: /s/ Drew McDonald --------------------------------------- Name: Drew McDonald Title: Authorized Representative By: /s/ Ralph Kern --------------------------------------- Name: Ralph Kern Title: Authorized Representative UMB BANK Lender By: /s/ Richard J. Lehrter --------------------------------------- Name: Richard J. Lehrter Title: Community Bank President FIRST UNION NATIONAL BANK Lender By: /s/ David Humphreys --------------------------------------- Name: David Humphreys Title: Vice President Third Amendment to Canadian Credit Agreement WESTDEUTSCHE LANDESBANK GIROZENTRALE Lender By: /s/ Salvatore Battinelli --------------------------------------- Name: Salvatore Battinelli Title: Managing Director, Credit Dept. By: /s/ Water T. Duffy III --------------------------------------- Name: Walter T. Duffy III Title: Associate Director THE BANK OF NEW YORK Lender By: /s/ Raymond J. Palmer --------------------------------------- Name: Raymond J. Palmer Title: Vice President ROYAL BANK OF CANADA Lender By: /s/ Tom J. Oberaigner --------------------------------------- Name: Tom J. Oberaigner Title: Senior Manager SUNTRUST BANK, ATLANTA Lender By: /s/ David J. Edge --------------------------------------- Name: David J. Edge Title: Director THE CHASE MANHATTAN BANK, TORONTO BRANCH Lender By: --------------------------------------- Name: Title: Third Amendment to Canadian Credit Agreement CITIBANK CANADA Lender By: /s/ James K. G. Campbell --------------------------------------- Name: James K. G. Campbell Title: Vice President DEUTSCHE BANK AG NEW YORK BRANCH AND/OR CAYMAN ISLANDS BRANCH Lender By: /s/ Michael E. Keating --------------------------------------- Name: Michael E. Keating Title: Managing Director By: /s/ Joel Makowsky --------------------------------------- Name: Joel Makowsky Title: Vice President CANADIAN IMPERIAL BANK OF COMMERCE Lender By: /s/ Joelle Schellenberg --------------------------------------- Name: Joelle Schellenberg Title: Director By: /s/ David W. Richardson --------------------------------------- Name: David W. Richardson Title: Vice President ABN AMRO BANK CANADA Lender By: /s/ Mark Bohn --------------------------------------- Name: Mark Bohn Title: Group Vice President By: /s/ Teresa Wu --------------------------------------- Name: Teresa Wu Title: Vice President Third Amendment to Canadian Credit Agreement BAYERISCHE LANDESBANK GIROZENTRALE, CAYMAN ISLANDS BRANCH Lender By: /s/ Hereward Drummond --------------------------------------- Name: Hereward Drummond Title: Senior Vice President By: /s/ James H. Boyle --------------------------------------- Name: James H. Boyle Title: Vice President THE FUJI BANK, LIMITED Lender By: /s/ Jacques Azagury --------------------------------------- Name: Jacques Azagury Title: Senior Vice President & Manager CREDIT LYONNAIS NEW YORK BRANCH Lender By: /s/ Jacues Busquet --------------------------------------- Name: Jacques Busquet Title: Executive Vice President BANK OF TOKYO - MITSUBISHI (CANADA) Lender By: /s/ Davis J. Stewart --------------------------------------- Name: Davis J. Stewart Title: Vice President Third Amendment to Canadian Credit Agreement Third Amendment CONSENT AND AGREEMENT Devon Energy Corporation, a Delaware corporation ("Canadian Guarantor"), hereby (i) consents to the provisions of this Amendment and the transactions contemplated herein, (ii) ratifies and confirms the Guaranty dated as of August 29, 2000 made by it for the benefit of Canadian Agent and Lenders executed pursuant to the Credit Agreement and the other Canadian Loan Documents, (iii) agrees that all of its respective obligations and covenants thereunder shall remain unimpaired by the execution and delivery of this Amendment and the other documents and instruments executed in connection herewith, and (iv) agrees that the Canadian Guaranty and such other Canadian Loan Documents shall remain in full force and effect. DEVON ENERGY CORPORATION By: /s/ William T. Vaughn ----------------------------------- Name: William T. Vaughn Title: Senior Vice President - Finance Third Amendment to Canadian Credit Agreement COMPLIANCE CERTIFICATE NORTHSTAR ENERGY CORPORATION Reference is made to that certain Third Amendment to Canadian Credit Agreement dated as of July 31, 2001 (the "Third Amendment") among Northstar Energy Corporation, ("Northstar"), Bank of America Canada, individually and as administrative agent ("Canadian Agent"), and certain financial institutions ("Lenders"). Terms which are defined in the Third Amendment and which are used but not defined herein shall have the meanings given them in the Third Amendment. The undersigned, Paul F. Brereton, does hereby certify that he has made a thorough inquiry into all matters certified herein and, based upon such inquiry, experience, and the advice of counsel, does hereby further certify that: 1. He is the duly elected, qualified, and acting Vice President-Finance of Northstar. 2. All representations and warranties made by any Restricted Person in any Canadian Loan Document delivered on or before the date hereof are true on and as of the date hereof (except to the extent that the facts upon which such representations are based have been changed by the transactions contemplated in the Third Amendment) as if such representations and warranties had been made as of the date hereof. 3. No Default exists on the date hereof. 4. Each Restricted Person has performed and complied with all agreements and conditions required in the Canadian Loan Documents to be performed or complied with by it on or prior to the date hereof. IN WITNESS WHEREOF, this instrument is executed by the undersigned as of July 31, 2001. NORTHSTAR ENERGY CORPORATION By: /s/ Paul Brereton ------------------------------------ Paul F. Brereton Vice President-Finance